Form for making latex articles



Nov. 25, 1941. A, N. sPANEL FORM FOR MAKING LATEX ARTICLES.

F'iled Nov. 29, 1937 2 Sheets-Sheet 2 VIII IIIIIIIIIIQ INVENTOR. ,nzne

- SATTQRNEYZ Patented Nov. 25, 1941 UNITED STATES GFFICE 12 Claims.

This invention relates to forms for producing deposited, fiat, seamless latex articles.`

In the production of large fiat latex articles, prior to the present invention, it has been necessary to use large flat forms. These forms, due to their size were diicult to handle. Large dipping tanks were needed to accommodate the forms and consequently a large amount of latex was also necessary. All of these factors added to the cost of production of the articles. Another problem was encountered when it Was desired to furnish the articles in a variety of colors. For each color, a large batch of latex had to be compounded` and additional dipping tanksY had to be provided.

Accordingly, the purpose of the present invention is to produce these articles on forms that are very much smaller `than the length of the article or its width, or both, thereby making possible the use of very much smaller tanks and greatly reduced quantities of specially colored liquid latex. o

Another important advantage in the present invention is that the smaller forms make possible quicker dipping time by virtue of their reduced size, and also much easier handling in removing the deposited film of latex from the form.

It is an object of this invention `to provide a form on which a at latex article such as an face on which the apron or the like may be made by the deposition of latex thereon. Y Y l It is another object of this invention to provide a pocket forming means on a form to generate an integral pocket in the article deposited thereon. Y y v These and other objects and advantages of the invention will appear from the detailedudescription and claims when taken with the drawings in which: Y y

Fig. 1 is a plan view of an' apron made in accordance with the present invention; Y

Fig. 2 isa plan view of one face of a form VVon which the article of Fig. 1 may be made.

Fig. 3 is a plan view of the opposite face of the form shown in Fig. 2. o

Fig. 4 is an edge View of the form shown lin Figs. 2 and 3;

Fig. 5 is a vertical section taken on line 5-5 of Fig. 2;

Fig. 6 is an enlarged fragmentary sectional 55 View of the form shown in Figs. 2 and 3, showing a coating of latex applied to the form;

Fig. 7 is a section taken on line 1-1 of Fig. 4, showing a coating of latex applied to the form;

Fig. 8 is a section taken on line 8-8 of Fig. 4, showing a coating of latex applied to the form;

Fig. 9 is a fragmentary sectional view taken on line 9 9 of Fig. 2 and illustrating the manner in which latex is deposited on the pocketforming portion of the form;` Fig. 9A is a fragmentary portion of Fig. 9 illustrating a slightly modified construction;

Fig. 10 is a plan view `of a blank from which the form of the present invention may be made;

Fig. 11 is an edge view-'of the blank shown in Fig. 10 after it has been folded in accordance with the method of the present invention;

Fig. 12 is a vertical section through a blank illustrating a modified manner of forming the upper margin of the form;

Fig. 13 is'a fragmentary plan View of a still further modified form; 4 Y

Fig. 14 is an edge View of the form shown in Fig. 13,7and `v v Y Fig. 15 is a vertical section of the form shown in Fig. 13 taken on line |5-'I5 of that figure.

Referring to Fig. 1 of the drawings, 5 indicates a seamless deposited apron comprising a bib portion 6 and a body portion 1 provided with an integral pocket 8. An opening 9 is formed in the upper end of the lbib portion 6 to receive the neck of the wearer while the integral tie-strings l0 may be tied around the waist of the wearer. It will be noted that each of these tie-strings as deposited, extend upwardly toward the neck portion of the apron in order to reduce the necessary size of theform onwhich the' apron is deposited. l However, if the tie-strings I0 were left in the condition shown in Fig. l, the apron might present an insuiciently attractive appearance. In order to obviate this disadvantage, openings Il are provided in the apron adjacent the junction of the tie-strings I0 with the apron proper. The free end of each tie-string can be inserted in its related opening Il and the entire tie pulled therethrough. As a result of this operation, the tie-strings are permanently held in a downwardly extending position. All free edges of the apron are preferably reinforced by thickened deposits of latex integral with the apron as will appear hereinafter.

As mentioned above, if the apron 5 were made on a flat form, of a size equal to that of the apron in its normal shape, a relatively large dipping tank would be required. In order to reduce the size of the dipping tank with a consequent reduction of the amount of latex and to facilitate handling of the forms themselves, applicant has provided the novel form I shown in Figs. 2 and 3 which is approximately one-half as large as the article deposited thereon.

In its preferred construction, the form I5 comprises a blank I6 (Fig. 10) folded on itself as shown in Fig. 11 to provide two fiat sections I1 and I8 joined by a curved section I9, and having their adjacent surfaces spot welded together. The blank I6 as well as the marginal strips and various plates to be hereinafter described are removably adhere, may be used.

Raised borders 2D are provided at the edges of the curved section I8. A's shown in Figi 7, each border comprises one fiange of. a f

bendable metal strip 2| having therein a` longitudinally extending groove 22 which engagesthe edge of the-,curved-section of the `blank. The stripsmay be" soldered or otherwise secured to the blank. The lotherfiange 23 of each strip 2| provides-a support for thesealing plates 24 which are preferably soldered tothe flanges 23. Inyaddition to sealing the curved portion of the blankV and -therebyprevent latex vfrom entering therein whenV the form is immersed in latex, these plates carry theform-Supporting arms 25 whichQare adapted to be Vmountedon a suitable dipping rack(notshown)-. Y Y

The opposite verticaledges;of the fiat sections- I1 and-|8 are-also provided with longitudinallygrooved strips Y26 each having flanges 21 -whioh projectfromeach surface of the flat sectionsandylike borders 20 terminate in an abrupt edge-fora purpose'tofbe described. The groove in each Voi"Y these strips is-wide enough to snugly receive the superposed edges of the two sections. The strips are preferably soldered to the blank and in addition to forminga raised border for the form surfaces, hold the edges of the blank in contacting relation. The upper end 28 `of each strip 26 is Ymitered so that the flanges thereof vforma continuation of the border 2li-'on the curved Vsection of the-form. The lower end of each-,stripA stops short of thebottom of the form 'as' shown Aat 29 in Figs. 2 and 3. It will be noted in Fig. 10, that the rounded corners of the blank` ,I6 `have beenv cut inwardly of the longitudinal edges of the blank as indicated at 36, so-that-the article-defining wall 3| of the anges 21, :which project inwardly ofthe edge ofthe blankgwill lmerge with' thefrounded corners of the Acompleted form. The lower endof the-form betweenthey endsk of ,the strips 26 is defined by the abruptedges 32 `as shown in Figs. 2, 4 and 5. A-.plate- 33 havingv straight edges 34 which together with the adjacent flanges 21 define the tie-stringsII! ofthe-apron, is secured in spaced relationto each side edge of the section I8. 1 The curved -edges35'of the plate 33 define the outlineofv the bib-portions of the apron while a circular raised plate-i36 secured to-the section I8 Uingsymmetrical spacedY relation to the plate 33 defines'the neckopening 9 in the apron bib. Studs 31 projecting from the bib forming surface ofi1the form define the smallreinforced apertures I I *at 'the junction of the tie-strings I0 with the apron proper.

' If-desired, apocket Bemay be formed integrally with the apron by soldering or welding one end ofganfangularmpiece4 t38V `to the form surface. The' side 'edgesfand lower end 39 of the piece-38 are rounded to avoid abrupt edges, since an abrupt edge would generate a thin or weakened section in the latex deposited thereon. The junction of the piece 38 with the form surface may be smoothly rounded as at 4I) to avoid the accumulation of a thickened deposit of latex at this part if so desired, or the junction may be agrupt, as indicated at 40a in Fig. 9A, where a reinforced region is desired at the junction. While the pocket forming element 38 has been shown as applied to the body forming section I1 of the apron form, it will be understood that the invention is not limited to this particular Y 'location since the element could be applied to j .the opposite face of the form if it were desired toprovide la pocket in the bib portion of the apron.

;,Thebrokenflines in Fig. 10, represent the relative .positions of the various elements on the blank before the Same is folded. The plates 33 andS-andpocket forming piece 38 may be secured trthey blank either before or after the blank is folded. f

Inruse, the form I5,is preferably coated with latex byvdipping it into a latexbath in the lfollowing manner, although it is to be `understood that the form may be coated by spraying or the like, if desired. The form, supported from a suitable dipping rack (notrshown) by means of the `arms 25, with the abruptv edge 32 lowermost, is immersed into a tank Aof latex-and then withdrawn therefrom. The latex -will be uniformly deposited on the flat andcurved surfaces of-fthesections I1, VI8 and A.I9 as a layer 4I. However, at the recesses definedV by the borders 20 land the adjacent surface ofthe curved section; I-9 the latex will accumulate as a thickened reinforcing ridge 42 as shown in Fig. 1. Since the Lborderl terminates inan abrupt corner or edge 43 a4 thin or weakened line will be developed in the layer of latex at this edge Vwhereby the article may be readily trimmed. Latex will similarly accumulate at the recesses dened by the fianges l-21 to provide a reinforced margin for the body portion and one margin of the tiestrings ofthe apron, as shown at 44 in Fig. 8. At the abrupt edge of the flanges 21 a thin or weakened section will be developed in the latex layer permitting easyseparation of the waste latex deposited over the outer surface of the strips 26, from the reinforced edge 44 of the apron.' Since the plates 33 and-36 project abruptly from the form surface to'dene recesses with the adjacent surface of the form, latex will accumulate therein as a reinforcement for the margins defined by these plates, as shown at 45 in Figs. 6 and 8.UA As in the case of the flanges 2II and/,21, a weakened section will be developed in the latexA deposited on the abrupt corners of the plates whereby the latex deposited on the surfaces of these plates may be readily separated'ffrom the reinforced margins 45. Immediately above the lower abrupt edges 32 of the form the latex will accumulate as v'a reinforcement which in section is semi pear-shaped as shown in-applicants copending application, Serial No. 740,141, filed August 16, 1934. .As illustrated in Fig. 6 the latex will be deposited as a. substantially uniform layer 46 over the pocket forming member, which layer will be integral with the layer 4I deposited on the section I1.

The form may be dipped as many times as necessary to develop an apron of desired thickness. The apron may be vulcanized onthe form or after itvhas been stripped therefrom. If desired a prevulcanized latex may be used in Which case thelavyer of deposited latex need only be dried.- A j InFig. l12th'ere is shovvn a blank 50 for producing amodied form I5. -The blank I) hasone edge preferably beveled as at 5I and is folded back on itself as at 52 whereby the'opposite faces 53 of the blank are joined by the smooth curve of the folded portion 52. It Will be understood that the junction 54 may be soldered or other- Wise ,finished to avoid4 a recess in vwhich latex could accumulate as Va thickened deposit. EX- cept for this difference the form will be of the same construction as that described above. The completed form will be used in the same manner as the previously described form I5.

In Figs. 13 to 15 applicant has illustrated a still further modified construction. A cylindrical member 60 which corresponds to the curved portion I9 of the form I5, is provided with a slot '6I in which is seated one edge of a plate 62. The recess defined by the surface of the plate 62 and the adjacent surface of the member 60 is provided With fillets 63, which may be of solder or the like to prevent latex from accumulating therein. Each of the side edges of the plate 62 are provided with a grooved strip E4 similar to strip 26 applied to the form I5. A plate 65 of greater diameter than the cylindrical member 60 is secured to each end o-f the cylindrical member 60, so that a ange 66 projecting a slight distance beyond the curved surface of this member is provided at each end thereof. It will be understood that the faces of the forms illustrated in Figs. l2 and 13 will be provided With raised plates such as the plates 33 and 36 on form I5, in order to generate tie-strings and a neck opening in the article deposited thereon and may also be provided With a pocket forming member such as 38 at any desired point on the form to generate an integral pocket in the deposited article. These forms may be used in the same manner as set forth in detail in the description of form I5.

While the invention has been described particularly with reference to an apron, and to the forms and to the method of making the forms for producing an apron, it Will be understood that the invention is not to be limited by the detailed description, since many modifications, variations and adaptations will occur to those skilled in the art. These modifications, Variations and adaptations are to be considered as falling Within the scope of the invention as defined by the following claims.

What I claim is:

1. A form on which an article may be made by depositing rubber thereon, comprising a at section, a transversely curved section extending along one margin of said fiat section, the opposite surfaces of said flat section being joined by the curved surface of said curved section, reinforcement-generating means disposed along opposite edges of said flat section and the opposite ends of said transversely curved section, and article-outline defining means on at least one surface of said fiat section.

2. A form on which an article may be made by depositing rubber thereon comprising a plate, an elongated substantially straight cylindrical member having a groove therein, one edge of said plate being seated in said groove, article-reinforcement-generating means disposed along at least a portion of the margin of said plate and the ends of said cylindrical member.

3. A form on which an article may be made bydepositing rubberthereon comprising al mem,- berfmade'o'f sheet material, folded onfits'l to provi-dea flat sectionand a Substantially str ight portion rounded in cross section, disposed'alongf one margin of the fiat section, the opposite-'surface of said flat section beingj joined by' "the, rounded surface of said portion, vreinforcerrlentgenerating means disposed along the edges o f said rounded portion and along a portion of the remaining margins of said hat section. j

4. A form on which an article may be made by depositing rubber or the like thereon, comprising a plate-like section,'a substantially straightielongated portion, curved in cross section, extending along one margin of said plate-like section, the curved surface of said portionjoining the opposite surfaces of said plate-like section, reinforcementgenerating means on said portion and the platelike section to dene a portion of the margin of the article deposited thereon.

5. A form on which an article may be made by depositing rubber or the like thereon, comprising a plate-like section, a substantially straight elongated portion, curved in cross section, extending along one margin of said plate-like section, said portion being thicker than said plate-like section and the curved surface thereof smoothly joiningA the opposite surfaces of said plate-like section, reinforcement-generating means on said portion and the plate-like section to define a portion of the margin of the article deposited thereon.

6. A form on which an article may be made by depositing rubber or the like thereon, comprising a member made of sheet material folded along a substantially central line thereof to provide a curved section and a flat plate-like section, said flat plate-like section comprising superposed portions of said sheet material having their adj-acent surfaces in contact with each other, the opposite surfaces of said plate-like section being joined by the surface of said curved section, means on the opposite faces of said plate-like section for generating marginal reinforcements for the article deposited thereon.

'7. A form o-n which an article may be made by depositing rubber or the like thereon, comprising a plate-like section, a rounded border at one edge of said plate-like section having its surface merging With the opposite surfaces of said platelike section, means on one surface of said platelike section for developing a neck-receiving opening in the article deposited thereon and means on said last-mentioned surface for ldefining tie strings in said article.

8. A form on Which an article may be made by depositing rubber or the like thereon, comprising a sheet-like member having an abrupt edge at one end, a substantially straight enlarged, transversely curved section at the opposite end smoothly joining the opposite surfaces of said sheet-like member, and means on said form for supporting the same withthe abrupt edge lowermost.

9. A form on which a sheet-like article having a pocket integral therewith may be made by depositing rubber or the like thereon, said form having a surface for generating a sheet-like article, and a pocket-generating plate having one edge thereof secured to said surface, the remainder of said plate being spaced from said surface.

10. A form on which a sheet-like article having a pocket integral therewith may be made by depositing rubber or the like thereon, said form having a surface for generating a sheetlike article, and an angular plate having one edge thereof secured to said surface, the remainder of said plate being spaced from said surface, the'remaining edges of said plate being rounded in cross-section.

11. A form on which an article having a pocket` integral therewith may be made by depositing rubber or the like thereon, said form having an article-generating surface, and a pocket-forming plate having one edge thereof secured to said article-generating surface, the remainderfof said plate being spaced from said surface, the junction of the surfaces of saidplate with said article-generating surface being abrupt to Vprovide a recess in which a thickened deposit vof the rub- 15 ber orthe like will .be accumulatedto provide ABRAHAM N. SPANEL. 

